芳纶纤维塑料筋与混凝土之间的黏结强度  

Bond Strength of AFRP Rebars in Concrete

作　　者：薛伟辰[1] 方志庆[1] 王圆[1] 康明睿 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《建筑材料学报》2015年第4期537-545,共9页Journal of Building Materials

基　　金：教育部新世纪优秀人才支持计划项目(NCET-10-0636)

摘　　要：基于48个标准拉拔试验,对芳纶纤维塑料（AFRP）筋与普通C50混凝土、高性能C50混凝土、环氧树脂和水泥浆之间的黏结强度进行了比较系统的研究.结果表明：AFRP筋试件的破坏模式分为拔出破坏和劈裂破坏2种;破坏模式对AFRP筋黏结强度的影响不大;AFRP筋与混凝土的黏结强度约为变形钢筋与混凝土黏结强度的0.79~1.11倍;相比于高性能C50混凝土,AFRP筋与普通C50混凝土的黏结强度高10%左右;AFRP筋与环氧树脂的黏结强度较高,而与水泥浆的黏结强度则较低.最后,对AFRP筋与混凝土黏结强度的计算方法进行了探讨.Based on tests of 48 pull-out specimens, bond properties of AFRP rebars in C50 normal strength concrete, C50 high performance concrete, epoxy resin and grout were systematically investigated. The test results showed that the modes of failure for pull-out specimens with AFRP rebars included pull-out failure and splitting failure. The failure mode did not significantly affect the bond strength of pull-out specimens. The experiment also showed that the bond strength of AFRP rebars in concrete was 0.79 to 1.11 times that of the deformed steel rebars. The bond strength of AFRP rebars in normal strength concrete was a- bout 10% higher than that in high performance concrete. Compared with the AFRP rebars in concrete, the bond strength was higher than that in epoxy resin but lower than that the grout. Generally, the bond strength of AFRP rebars decreases with the diameter increasing. In addition, the calculation methods for the bond strength of AFRP rebars in the concrete were discussed.

关 键 词：芳纶纤维塑料筋 混凝土 黏结-滑移(τ-S)曲线 破坏模式 黏结强度 

分 类 号：TU377.9[建筑科学—结构工程]